>> reporter: meet the proudest parents on the planet, jack and jackie harbaugh. for their sons it is just another day at the office, as their two teams prepare for the biggest game of their lives. at 49ers practice, head coach jim harbaugh watched closely as he put his time to work. not too far away, harbaugh's brother, john, guided his baltimore ravens through their drills. but even tough as nails ray lewis found time to crack a joke. the harbaugh brothers will go head-to-head in what is being dubbed the harbowl. >> no one talks to anyone. jim is very quiet and guarded. john is very quiet and guarded. that's exactly the way we wanted them. >> reporter: their mother she is more optimistic. >> this is like -- frosting on the cake for our whole family. >> reporter: odd makers have the 49ers favored by 3 1/2 points. but the super bowl is in new orleans, so if you want a prediction ask the expert at reverend zombie's house of voodoo. even then there is no clear answer. >> your regret is upside down. and their, their sorrow is side ways. i can't really say. but, i can